中文说明：图åƒ
English Description：
Image Enhancement involves the processing of an image for improving its visualization for different applications. Process involves processing the image by altering its structural features like contrast and resolution. Many image enhancement techniques are available but the choice of technique depends upon application for which image is being processed and image modality. Image enhancement can be categorized by spatial domain and frequency domain. Different image enhancement techniques are analyzed and their upsides and downsides are highlighted in the paper.